Transmission mechanism of combine harvester

Abstract

The utility model belongs to the technical field of mechanical structures, and particularly relates to a transmission mechanism of a combine harvester, which comprises a diesel engine, a fan device, a threshing mechanism, a header conveying mechanism, a crushing mechanism, an auger mechanism and a vibrating screen mechanism, the diesel engine is in transmission connection with one end of the fan device; the threshing mechanism, the header conveying mechanism, the crushing mechanism and the auger mechanism are respectively in transmission connection with the other end of the fan device; and the vibrating screen mechanism is in transmission connection with the auger mechanism. According to the mechanism, all the mechanisms are connected in parallel, especially the threshing mechanism is connected with the header conveying mechanism in parallel, the rotating speed of the threshing cylinder and the rotating speed of the conveying chain wheel can be adjusted respectively, harvesting of different crops is adapted, and the utilization rate of the combine harvester is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical structure technical field, concretely relates to a transmission mechanism of combine harvester. BACKGROUND

[0002] In the field of agricultural mechanized harvesting, the combine harvester plays a vital role and greatly improves the crop harvesting efficiency. The current widely used combine harvester on the market usually adopts a series connection mode for the transmission of the threshing and header conveying parts, as shown in the figure. This design architecture is mainly developed for the harvesting needs of wheat and rice in the early stage. Figure 2

[0003] Wheat and rice have relatively similar plant morphology, stem toughness and grain attachment characteristics, and the traditional series transmission combine harvester can better adapt to their harvesting process, and the threshing effect and header conveying stability are acceptable. However, with the increasing diversification of agricultural planting structure, the planting area of crops such as corn and soybean is continuously expanding, which puts forward higher requirements for the versatility of the combine harvester.

[0004] When using the existing such combine harvester to harvest corn, the corn plant is tall, the stem is thick, and the grain arrangement and attachment mode is completely different from that of wheat and rice. The series transmission makes it difficult to flexibly change the speed of the threshing part according to the characteristics of corn, which can easily cause the grain to be not fully threshed or the grain to be damaged by excessive threshing. At the same time, due to the inability to adjust the speed of the header conveying part to adapt to the thickness and weight of the corn straw, the straw is often blocked and the conveying is not smooth, which greatly affects the harvesting effect. Similarly, when harvesting soybeans, the soybean plant is relatively fragile and the pods are easy to crack. The fixed threshing and header conveying speed of the existing combine harvester cannot meet the fine harvesting requirements, resulting in a high loss rate of soybean grains.

[0005] If the existing combine harvester is to be modified for speed adjustment according to different crops, it often involves complex mechanical structure adjustment and replacement of a large number of matching parts, which not only consumes a lot of manpower, material resources and time cost, but also is extremely difficult for ordinary farmers to operate, which is not conducive to the efficient development of agricultural production. Therefore, there is an urgent need for a combine harvester technology scheme that can conveniently adjust the threshing and header conveying speed to adapt to the harvesting of various crops to fill this market gap. SUMMARY

[0006] The utility model aims at the deficiencies of the prior art, and provides a transmission mechanism of combine harvester, which can adjust the speed of the threshing drum and the header conveying part respectively, so as to adapt to the harvesting of different crops and improve the utilization rate of the combine harvester.

[0007] The above object is achieved by the following technical scheme:​

[0008] A transmission mechanism of a combine harvester, comprising a diesel engine, a fan device, a threshing mechanism, a header conveying mechanism, a crushing mechanism, an auger mechanism and a vibrating screen mechanism; the diesel engine is in transmission connection with one end of the fan device; the threshing mechanism, the header conveying mechanism, the crushing mechanism and the auger mechanism are respectively in transmission connection with the other end of the fan device; the vibrating screen mechanism is in transmission connection with the auger mechanism.

[0009] Preferably, the diesel engine is in transmission connection with the fan device through a first transmission unit, and the first transmission unit comprises a first driving pulley, a first driven pulley and a first transmission belt; the first driving pulley is connected with a power output shaft of the diesel engine, the first driven pulley is connected with a power input shaft of the fan device, and the first driven pulley is in transmission connection with the first driving pulley through the first transmission belt.

[0010] Preferably, a power output end of the fan device is provided with a second transmission unit, and the second transmission unit comprises a second driving pulley, a second driven pulley and a second transmission belt; the second driving pulley is connected with the power output end of the fan device, the second driven pulley is in transmission connection with the second driving pulley through the second transmission belt; the crushing mechanism is connected with the second driving pulley; the threshing mechanism, the header conveying mechanism and the auger mechanism are respectively connected with the second driven pulley.

[0011] Preferably, the threshing mechanism comprises a threshing cylinder and a third transmission unit, and the third transmission unit comprises a third driving pulley, a third driven pulley and a third transmission belt; the third driving pulley is fixedly connected with the second driven pulley in a same axis, the third driven pulley is in transmission connection with the third driving pulley through the third transmission belt; the threshing cylinder is connected with the third driven pulley.

[0012] Preferably, a gear mechanism is arranged between the threshing cylinder and the third driven pulley; the third driven pulley is connected with a power input end of the gear mechanism, and the threshing cylinder is connected with a power output end of the gear mechanism.

[0013] Preferably, the header conveying mechanism comprises a reel, a conveying sprocket and a fourth transmission unit, and the fourth transmission unit comprises a fourth driving pulley, a fourth driven pulley and a fourth transmission belt; the fourth driving pulley is fixedly connected with the second driven pulley in a same axis, the fourth driven pulley is in transmission connection with the fourth driving pulley through the fourth transmission belt; the reel and the conveying sprocket are respectively connected with the fourth driven pulley.

[0014] Preferably, the crushing mechanism comprises a crushing cutter and a fifth transmission unit, and the fifth transmission unit comprises a fifth driving pulley, a fifth driven pulley and a fifth transmission belt; the fifth driving pulley is fixedly connected with the second driving pulley in a same axis, the fifth driven pulley is in transmission connection with the fifth driving pulley through the fifth transmission belt; the crushing cutter is connected with the fifth driven pulley.

[0015] Preferably, the stirring mechanism comprises a grain stirring mechanism, a waste stirring mechanism and a sixth transmission unit; the sixth transmission unit comprises a sixth driving pulley, a sixth driven pulley, a seventh driven pulley and a sixth transmission belt; the sixth driving pulley is coaxially fixedly connected with the second driven pulley, the sixth driven pulley and the seventh driven pulley are in transmission connection with the sixth driving pulley through the sixth transmission belt; the grain stirring mechanism is connected with the sixth driven pulley, and the waste stirring mechanism is connected with the seventh driven pulley.

[0016] Preferably, the vibrating screen mechanism comprises a vibrating screen and a seventh transmission unit; the seventh transmission unit comprises a seventh driving pulley, an eighth driven pulley and a seventh transmission belt; the seventh driving pulley is coaxially fixedly connected with the seventh driven pulley, and the eighth driven pulley is in transmission connection with the seventh driving pulley through the seventh transmission belt; the vibrating screen is connected with the eighth driven pulley.

[0017] The technical scheme has the following beneficial effects:

[0018] 1) Improve versatility. The transmission mechanism of the combine harvester proposed in the present application can adjust the rotating speed of the threshing cylinder and the header conveyor respectively, which can effectively adapt to the harvesting characteristics of different crops, greatly improving the versatility of the combine harvester for various crops, and meeting the use requirements under the background of the increasing diversification of agricultural planting structure.

[0019] 2) Reduce the cost and difficulty of modification. The technical scheme considers the adjustable rotating speed to adapt to multiple crops at the beginning of the design of the transmission mechanism, without the need for subsequent complex and high-cost modification. Farmers only need to replace simple parts when using, without facing complicated modification procedures, reducing the operation difficulty, and being more conducive to efficient agricultural production.

[0020] 3) Clear structure and flexibility. The present application details the specific transmission connection mode between various parts of the transmission mechanism, such as the diesel engine, the fan device, the threshing mechanism, the header conveying mechanism, etc. Through the cooperation of multiple transmission units, a clear and reasonable transmission system with adjustable rotating speed is constructed, so that the transmission between each part is relatively independent and interrelated, the structure is flexible, and it is convenient to adjust the corresponding rotating speed according to the harvesting requirements of different crops, ensuring the smooth progress of the harvesting operation.

[0021] 4) Benefit to improve utilization rate. Since the rotating speed can be conveniently adjusted to adapt to different crops, the combine harvester is no longer limited to the effective harvesting of only a few crops such as wheat and rice, but can be widely used in the harvesting of various crops such as corn and soybeans, and can play a role in different crop harvesting seasons, thereby improving the overall utilization rate of the combine harvester, reducing the idle condition of the equipment, and saving agricultural production resources to some extent. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A schematic view of a transmission mechanism structure of a preferred structure of the technical solution;

[0023] Figure 2 A schematic view of a structure of an existing transmission mechanism.

[0024] Wherein:

[0025] 1, diesel engine; 2, fan device; 3, first driving pulley; 4, first driven pulley; 5, first transmission belt; 6, second driving pulley; 7, second driven pulley; 8, second transmission belt; 9, threshing cylinder; 10, third driving pulley; 11, third driven pulley; 12, third transmission belt; 13, gear mechanism; 14, conveying sprocket; 15, fourth driving pulley; 16, fourth driven pulley; 17, fourth transmission belt; 18, crushing cutter; 19, fifth driving pulley; 20, fifth driven pulley; 21, fifth transmission belt; 22, grain auger; 23, chaff auger; 24, sixth driving pulley; 25, sixth driven pulley; 26, seventh driven pulley; 27, sixth transmission belt; 28, vibrating screen; 29, seventh driving pulley; 30, eighth driven pulley; 31, sixth transmission belt; 32, adapter shaft. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0027] Therefore, the following detailed description of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0028] In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0029] In the utility model, unless another definite provision and limitation, the terms "mount", "fit", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect;Can be mechanical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] The embodiment discloses a transmission mechanism of a combine harvester, as a preferred embodiment of the technical scheme, as shown in Figure 1 The diesel engine 1 is in transmission connection with one end of the fan device 2;The threshing mechanism, the header conveying mechanism, the crushing mechanism and the auger mechanism are respectively in transmission connection with the other end of the fan device 2;The vibrating screen mechanism is in transmission connection with the auger mechanism.

[0032] The technical scheme takes the diesel engine 1 as the core power source stable output torque, and is in transmission connection with one end of the fan device 2. Specifically, a specially-made high-strength transmission shaft can be used to realize close transmission connection, and the transmission shaft is accurately matched with a suitable diameter, material and connection key specification according to the required rotating speed and power of the fan device 2, so as to ensure the efficiency and reliability in the power transmission process, and lay a solid foundation for subsequent complex operation processes.

[0033] The fan device 2 plays a key role of "power distribution hub" in the whole transmission architecture, and the other end is like a star type divergence, the threshing mechanism, the header conveying mechanism, the crushing mechanism and the auger mechanism are respectively in independent transmission link with the other end, and form a unique parallel layout. This layout completely breaks the disadvantages of mutual restraint of the power of each mechanism in the traditional series transmission mode. For example, in the actual harvesting scene, when the threshing mechanism faces a larger load and rotating speed fluctuation due to processing crops such as wet and strong crops, the header conveying mechanism can continuously and stably operate and work according to the established harvesting rhythm, and the smoothness and coherence of the whole harvesting process are guaranteed, and the operation efficiency is greatly improved.

[0034] Based on the above structure, the threshing mechanism of the technical scheme has a speed that is appropriate for the crop. In the face of different grain characteristics of different crops, the independent speed regulation function of the threshing mechanism shows unique precision. The specific operator can adjust the transmission-related mechanical size of the threshing mechanism as needed to change the working speed of the threshing mechanism. Based on this function, for example, in the harvesting season, for crops that are mature, full, and easy to thresh, the speed is appropriately reduced, and the optimized threshing gap is matched, which is of great significance to reducing grain damage; on the contrary, for crops with high water content and tightly attached grains, the speed is increased, and the angle and arrangement of the threshing teeth are dynamically adjusted, which is of great significance to ensuring that the grains are completely threshed and reducing the loss rate of the harvested crops.

[0035] Further, based on the above structure, the header conveying mechanism has an adaptive feature that responds to the environment. Similarly, the operator can adjust the transmission-related mechanical size of the header conveying mechanism as needed to change the working speed of the header conveying mechanism. On this basis, for example, when entering a soybean field, the header conveying mechanism needs to run gently after the transmission-related mechanical size is changed, precisely lift the soybean plants and smoothly guide them into the header conveying mechanism, which is of great significance to avoiding plant lodging and pod cracking to the greatest extent and ensuring that the beans are stored in the warehouse. When facing tall crops such as sorghum, the lifting system of the header conveying mechanism perfectly cooperates with the adjusted speed, rises and falls with the terrain and changes in crop height, and the header automatically rises and falls, while the speed of the header conveying mechanism is increased after the transmission-related mechanical size is changed, ensuring that crops of different heights can be precisely cut and efficiently conveyed, greatly expanding the adaptation boundary of the harvester to complex planting environments.

[0036] The parallel connection of the crushing mechanism and other mechanisms gives it the ability to independently adjust the speed according to the characteristics of the straw. Similarly, the transmission-related mechanical size of the crushing mechanism is adjusted as needed to change its speed. After harvesting, the straw enters the crushing link. For hard straws such as corn and sorghum, the crushing cutter 18 in the crushing mechanism needs to rotate at high speed to ensure that the straw is crushed into small and uniform pieces to meet the stringent return-to-field standard. When dealing with relatively soft straws such as wheat and rice, the speed is appropriately reduced to ensure straw treatment effect while achieving energy saving and efficiency improvement.

[0037] The auger mechanism, as a key link in material conveying, closely cooperates with the crushing mechanism and the threshing mechanism. Its speed is adjusted as needed to change its speed according to the material flow. When the threshing and crushing operations are busy and the material output is large, the auger mechanism runs faster to ensure that the mixture is timely transported backward and to eliminate the risk of blockage. In the final stage of the operation, the auger mechanism slows down smoothly to maintain a stable conveying rhythm and ensure that the entire material processing process runs smoothly and efficiently.

[0038] The vibration screen mechanism is in transmission connection with the auger mechanism, and a dynamic regulation and control system for screening the harvested materials is constructed. When a large amount of materials rapidly flows in, the vibration screen mechanism needs to increase the amplitude and the vibration frequency, so that the grains, impurities and broken straws are fully separated by means of the motion characteristic difference of different material particles on the screen surface. Since the vibration screen mechanism is linked with the fan device through the auger mechanism, the rotating speed of the fan device and the rotating speed of the auger mechanism are also increased synchronously. If the flowing-in materials are reduced, the vibration screen needs to reduce the amplitude and the vibration frequency, and correspondingly, the rotating speed of the fan device and the rotating speed of the auger mechanism are also increased synchronously, so as to ensure that the screening precision is always the same, and finally, the pure and high-quality harvested materials are provided for the farmers.

[0039] Embodiment 2

[0040] The embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on embodiment 1, the diesel engine 1 is in transmission connection with the fan device 2 through the first transmission unit, and the first transmission unit comprises a first driving pulley 3, a first driven pulley 4 and a first transmission belt 5.

[0041] The first driving pulley 3 is made of high-strength alloy steel material and is formed through precision forging and numerical control machining, is connected with the power output shaft of the diesel engine 1 through an involute spline, ensures the coaxiality and transmission precision of the connection, can efficiently transmit the power of the diesel engine 1, and is not prone to looseness or deformation under high-load operation.

[0042] The first driven pulley 4 is made of cast iron material with good wear resistance and self-lubricating performance, is connected with the power input shaft of the fan device 2 in an interference fit mode, and guarantees the stability of power transmission. The first driven pulley 4 and the first driving pulley 3 are in transmission through the matched first transmission belt 5.

[0043] The first transmission belt 5 is selected from a triangular belt composed of multiple layers of high-strength rubber and polyester fiber, has good elasticity and wear resistance, can buffer the vibration generated during the operation of the diesel engine 1, and can guarantee the efficiency of power transmission, thereby laying a solid foundation for subsequent complex operation processes.

[0044] Embodiment 3

[0045] The embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on embodiment 1 or 2, a second transmission unit is arranged at the power output end of the fan device 2, and the power distribution and transmission path are further refined. The second transmission unit comprises a second driving pulley 6, a second driven pulley 7 and a second transmission belt 8.

[0046] The second driving pulley 6 is rigidly connected with the power output end of the fan device 2 through a special high-strength bolt, ensuring the reliability of power transmission and effectively bearing the torque impact generated when the fan is running at high speed. The second driven pulley 7 is drivingly connected with the second driving pulley 6 through a second transmission belt 8, which is made of a high-performance composite material similar to the first transmission belt 5, and has excellent tensile and fatigue resistance, ensuring long-term stable operation.

[0047] The second driving pulley 6 is rigidly connected with the power output end of the fan device 2 through a special high-strength bolt, ensuring the reliability of power transmission and effectively bearing the torque impact generated when the fan is running at high speed. The second driven pulley 7 is drivingly connected with the second driving pulley 6 through a second transmission belt 8, which is made of a high-performance composite material similar to the first transmission belt 5, and has excellent tensile and fatigue resistance, ensuring long-term stable operation.

[0048] The threshing mechanism, the cutter table conveying mechanism and the auger mechanism are ingeniously connected with the second driven pulley 7, specifically, an adapter shaft 32 is additionally arranged on the second driven pulley 7 and is finely dynamically balanced and adjusted, the adapter shaft 32 is made of high-strength alloy steel and has good rigidity and torsional resistance, the threshing mechanism, the cutter table conveying mechanism and the auger mechanism are connected in parallel on the adapter shaft 32 through a precision shaft coupling, realizing that the power among the mechanisms does not interfere with each other and the rotating speed can be independently adjusted, and breaking through the limitation of traditional series transmission.

[0049] Embodiment 4

[0050] The embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical scheme, that is, based on the embodiments 1, 2 or 3, the threshing mechanism comprises a threshing cylinder 9 and a third transmission unit, the third transmission unit adopts a belt transmission mode and comprises a third driving pulley 10, a third driven pulley 11 and a third transmission belt 12.

[0051] The third driving pulley 10 is fixedly connected with the second driven pulley 7 in a coaxial mode, ensuring stable power input, and the coaxial design reduces energy loss and vibration in the power transmission process, ensuring the accuracy of transmission. The third driven pulley 11 is drivingly connected with the third driving pulley 10 through the third transmission belt 12, and the belt is made of a high-strength, wear-resistant and flexible rubber composite material and can adapt to the tension change under high-speed operation.

[0052] The threshing cylinder 9 is connected with the third driven pulley 11, and when the rotating speed of the threshing cylinder 9 needs to be adjusted, the size ratio of the third driving pulley 10 and the third driven pulley 11 can be changed to easily achieve the adjustment. For example, for soybeans, a relatively large-diameter third driven pulley 11 can be selected to match a smaller-diameter third driving pulley 10, according to the pulley transmission ratio principle, the rotating speed of the threshing cylinder 9 is reduced, and the seed damage is reduced; for rice, wheat and other difficult threshing crops, the size of the pulley is adjusted in the opposite way, the rotating speed is increased, and the adjustable threshing tooth plate is matched, to ensure that the seeds are completely and efficiently separated, and the adaptability to different crops is greatly improved.

[0053] Embodiment 5

[0054] This embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on Embodiment 4, a gear mechanism 13 is arranged between the threshing cylinder 9 and the third driven pulley 11. The third driven pulley 11 is connected with the power input end of the gear mechanism 13, and the threshing cylinder 9 is connected with the power output end of the gear mechanism 13. The arrangement of the gear mechanism 13 facilitates power steering, and facilitates the installation of the threshing cylinder in a predetermined direction under the compact structural layout of the combine harvester.

[0055] Embodiment 6

[0056] This embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on Embodiment 3, 4 or 5, the header conveying mechanism also has a delicate transmission design, which includes a conveying sprocket 14 and a fourth transmission unit. The fourth transmission unit includes a fourth driving pulley 15, a fourth driven pulley 16 and a fourth transmission belt 17.

[0057] The fourth driving pulley 15 is coaxially fixedly connected with the second driven pulley 7, which means that when the second driven pulley 7 rotates, the fourth driving pulley 15 will rotate synchronously, ensuring that the power is stably transmitted from the second driven pulley 7 to the fourth driving pulley 15. Then, the fourth driven pulley 16 is transmissionally connected with the fourth driving pulley 15 through the fourth transmission belt 17, and the power is effectively transmitted to the fourth driven pulley 16 by utilizing the characteristics of belt transmission. Finally, the reel and the conveying sprocket 14 are respectively connected with the fourth driven pulley 16, so that the power from the fourth driven pulley 16 can drive the conveying sprocket 14 and the reel to rotate, thereby realizing the material righting, cutting and conveying functions of the header conveying mechanism.

[0058] This transmission structure design has certain advantages, such as relatively stable belt transmission, which can buffer certain impact load and can adapt to different center distance requirements to some extent, facilitating the installation and layout of the equipment. At the same time, the connection between the components is closely matched, which together completes the task of the header conveying, and plays an important role in the efficient operation of agricultural machinery such as combine harvesters.

[0059] Embodiment 7

[0060] This embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on Embodiment 3, 4, 5 or 6, the pulverizing mechanism shoulders the heavy responsibility of pulverizing straw for returning to the field in the entire harvester operation process, which includes a pulverizing cutter 18 and a fifth transmission unit. The fifth transmission unit includes a fifth driving pulley 19, a fifth driven pulley 20 and a fifth transmission belt 21.

[0061] The fifth driving pulley 19 is coaxially fixedly connected with the second driving pulley 6, which enables the crushing mechanism to directly obtain the strong power output by the fan device 2, thereby ensuring the high efficiency of the crushing operation. The fifth driven pulley 20 is in transmission connection with the fifth driving pulley 19 through a fifth transmission belt 21. The fifth transmission belt 21 is made of rubber material with high strength, wear resistance and certain flexibility, so as to adapt to the impact and vibration in the crushing process.

[0062] The crushing cutter 18 is connected with the fifth driven pulley 20 and can work cooperatively with the fan according to the change of the fan speed due to the coaxiality with the second driving pulley 6. When harvesting hard stalk crops such as corn and sorghum, the fan runs at high speed to drive the crushing cutter 18 to rotate at high speed, so that the stalks are rapidly crushed into small and uniform pieces by virtue of the sharp cutting edge and the optimized cutter design, thereby meeting the stringent standard of returning to the field. When facing relatively soft stalks such as wheat and rice, the fan speed can be appropriately reduced, and the crushing cutter 18 also runs at an adaptive speed, thereby ensuring the effect of stalk processing while realizing energy saving and efficiency improvement, and further improving the comprehensive processing capacity of the whole machine for different crops.

[0063] Embodiment 8

[0064] This embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical solution, i.e., based on embodiments 3, 4, 5, 6 or 7, the auger mechanism is a key link for material conveying and preliminary classification, which includes a grain auger 22, a chaff auger 23 and a sixth transmission unit. The sixth transmission unit includes a sixth driving pulley 24, a sixth driven pulley 25, a seventh driven pulley 26 and a sixth transmission belt 27.

[0065] The sixth driving pulley 24 is coaxially fixedly connected with the second driven pulley 7, which ensures a stable and continuous power input source, so that the auger mechanism can closely match the operation rhythm of the whole machine. The sixth driven pulley 25 and the seventh driven pulley 26 are in transmission connection with the sixth driving pulley 24 through the sixth transmission belt 27. The sixth transmission belt 27 is made of rubber material with high strength, wear resistance and excellent tensile property, which can stably transmit power in a complex material conveying environment and avoid problems such as belt slipping or breaking.

[0066] The grain auger 22 is connected with the sixth driven pulley 25 and is responsible for efficiently conveying the threshed grains to the designated collection area. The speed of the grain auger 22 can be flexibly adjusted according to the output of the threshing mechanism and the requirements of the subsequent processing link. For example, when the threshing operation is busy and the grain output is large, the transmission ratio of the sixth driving pulley 24 and the sixth driven pulley 25 is appropriately adjusted to increase the speed of the grain auger 22, thereby ensuring that the grains are timely cleaned and avoiding accumulation to affect the subsequent operation.

[0067] The miscellaneous stirring dragon 23 is connected with the seventh driven pulley 26, mainly undertakes the transport of the miscellaneous (such as straw debris, shriveled grains and the like) generated in the threshing and screening process to a separate processing area, and its rotating speed can also be regulated as required, and cooperates with the grain stirring dragon 22 to guarantee the accuracy and efficiency of material diversion and optimize the material processing process of the entire harvester.

[0068] Embodiment 9

[0069] This embodiment discloses a transmission mechanism of a combine harvester, which is a preferred embodiment of the technical solution, i.e. based on embodiment 8, the vibrating screen mechanism undertakes the important task of accurately screening pure grains from mixed materials, and it comprises a vibrating screen 28 and a seventh transmission unit. The seventh transmission unit comprises a seventh driving pulley 29, an eighth driven pulley 30 and a seventh transmission belt.

[0070] The seventh driving pulley 29 is coaxially fixedly connected with the seventh driven pulley 26, forming a close power connection link to ensure the continuity of power transmission. The eighth driven pulley 30 is in transmission connection with the seventh driving pulley 29 through the seventh transmission belt, and the seventh transmission belt is made of rubber material with good flexibility and strong fatigue resistance, which can adapt to the high-frequency and long-time vibration working condition of the vibrating screen and stably provide power for the vibrating screen 28.

[0071] The vibrating screen 28 is connected with the eighth driven pulley 30, and its vibration frequency and amplitude can be adjusted synchronously with the speed of the material transported by the stirring mechanism. When a large amount of material rapidly flows in, the vibrating screen needs to increase the amplitude and vibration frequency, so as to make the grains, impurities and broken straws fully separated by means of the motion characteristic differences of different material particles on the screen surface. Since the vibrating screen mechanism is linked with the fan device and the stirring mechanism, the rotating speed of the fan device and the rotating speed of the stirring mechanism are also increased synchronously at this time. If the material flowing in is reduced, the vibrating screen needs to reduce the amplitude and vibration frequency, and correspondingly, the rotating speed of the fan device and the rotating speed of the stirring mechanism are also increased synchronously at this time. In this way, the screening accuracy is always consistent, and finally the pure and high-quality harvested materials are presented to the farmers.

Claims

1. A transmission mechanism for a combine harvester, characterized in that: It includes a diesel engine (1), a blower unit (2), a threshing mechanism, a header conveyor mechanism, a crushing mechanism, an auger mechanism, and a vibrating screen mechanism; the diesel engine (1) is driven to one end of the blower unit (2); the threshing mechanism, the header conveyor mechanism, the crushing mechanism, and the auger mechanism are driven to the other end of the blower unit (2); wherein: The power output end of the fan device (2) is provided with a second transmission unit. The second transmission unit includes a second driving pulley (6), a second driven pulley (7), and a second transmission belt (8). The second driving pulley (6) is connected to the power output end of the fan device (2), and the second driven pulley (7) is connected to the second driving pulley (6) through the second transmission belt (8). The crushing mechanism is connected to the second drive pulley (6); The threshing mechanism includes a threshing drum (9) and a third transmission unit. The third transmission unit includes a third driving pulley (10), a third driven pulley (11), and a third transmission belt (12). The third driving pulley (10) is coaxially and fixedly connected to the second driven pulley (7). The third driven pulley (11) is connected to the third driving pulley (10) via the third transmission belt (12). The threshing drum (9) is connected to the third driven pulley (11). The header conveying mechanism includes a reel, a conveying sprocket (14), and a fourth transmission unit. The fourth transmission unit includes a fourth driving pulley (15), a fourth driven pulley (16), and a fourth transmission belt (17). The fourth driving pulley (15) is coaxially and fixedly connected to the second driven pulley (7). The fourth driven pulley (16) is connected to the fourth driving pulley (15) via the fourth transmission belt (17). The reel and the conveying sprocket (14) are respectively connected to the fourth driven pulley (16). The auger mechanism is connected to the second driven pulley (7), and the vibrating screen mechanism is connected to the auger mechanism in a transmission connection.

2. The transmission mechanism of a combine harvester as described in claim 1, characterized in that: The diesel engine (1) is connected to the fan device (2) through a first transmission unit, and the first transmission unit includes a first driving pulley (3), a first driven pulley (4) and a first transmission belt (5); the first driving pulley (3) is connected to the power output shaft of the diesel engine (1), the first driven pulley (4) is connected to the power input shaft of the fan device (2), and the first driven pulley (4) and the first driving pulley (3) are connected through the first transmission belt (5).

3. The transmission mechanism of a combine harvester as described in claim 1, characterized in that: A gear mechanism (13) is provided between the threshing drum (9) and the third driven pulley (11); the third driven pulley (11) is connected to the power input end of the gear mechanism (13), and the threshing drum (9) is connected to the power output end of the gear mechanism (13).

4. The transmission mechanism of a combine harvester as described in claim 1, characterized in that: The crushing mechanism includes a crushing blade (18) and a fifth transmission unit. The fifth transmission unit includes a fifth driving pulley (19), a fifth driven pulley (20), and a fifth transmission belt (21). The fifth driving pulley (19) is coaxially and fixedly connected to the second driving pulley (6). The fifth driven pulley (20) is connected to the fifth driving pulley (19) via the fifth transmission belt (21). The crushing blade (18) is connected to the fifth driven pulley (20).

5. The transmission mechanism of a combine harvester as described in claim 1, characterized in that: The auger mechanism includes a grain auger (22), a waste auger (23), and a sixth transmission unit; the sixth transmission unit includes a sixth driving pulley (24), a sixth driven pulley (25), a seventh driven pulley (26), and a sixth transmission belt (27); the sixth driving pulley (24) is coaxially and fixedly connected to the second driven pulley (7), and the sixth driven pulley (25) and the seventh driven pulley (26) are connected to the sixth driving pulley (24) via the sixth transmission belt (27); the grain auger (22) is connected to the sixth driven pulley (25), and the waste auger (23) is connected to the seventh driven pulley (26).

6. The transmission mechanism of a combine harvester as described in claim 5, characterized in that: The vibrating screen mechanism includes a vibrating screen (28) and a seventh transmission unit; the seventh transmission unit includes a seventh driving pulley (29), an eighth driven pulley (30) and a sixth transmission belt (27); the seventh driving pulley (29) is coaxially and fixedly connected to the seventh driven pulley (26), and the eighth driven pulley (30) is connected to the seventh driving pulley (29) via the seventh transmission belt; the vibrating screen (28) is connected to the eighth driven pulley (30).

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